CN109100588A - The measurement method and device that metal oxide pressure-limiting device protecting energy is integrally delayed - Google Patents
The measurement method and device that metal oxide pressure-limiting device protecting energy is integrally delayed Download PDFInfo
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- CN109100588A CN109100588A CN201810751835.9A CN201810751835A CN109100588A CN 109100588 A CN109100588 A CN 109100588A CN 201810751835 A CN201810751835 A CN 201810751835A CN 109100588 A CN109100588 A CN 109100588A
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- metal oxide
- limiting device
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- oxide pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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Abstract
The measurement method and device being integrally delayed the present invention relates to metal oxide pressure-limiting device protecting energy.The described method includes: measuring device, which will trigger the electric current that metal oxide pressure-limiting device protecting energy acts, is input to series capacitor compensation protection system to be tested；The current sampling data of the metal oxide pressure-limiting device and the output voltage sampled data of pulse transformer are obtained simultaneously；Based on the current sampling data, the absorption energy of the metal oxide pressure-limiting device is calculated；The reference time is set as at the time of the absorption energy is reached pre-value；Operating time of protection is set as at the time of the output voltage sampled data is reached peak value；Determine that metal oxide pressure-limiting device protecting energy is integrally delayed by the time difference of the reference time and the operating time of protection.The measurement method and device being integrally delayed the present invention provides metal oxide pressure-limiting device protecting energy, the design for string complement system provide foundation.
Description
Technical field
The present invention relates to flexible ac transmission technology fields, and in particular to metal oxide pressure-limiting device protecting energy integrally prolongs
When measurement method and device.
Background technique
In order to improve the transmission capacity and system stability of transmission line of electricity in electric system, using series capacitor compensation skill
Art.Metal oxide pressure-limiting device is also referred to as MOV (Metal-oxide varistor), the pass as series capacitor compensation system
One of button apparatus plays an important role to the overvoltage at limitation series capacitor group both ends.Due to absorbing energy during MOV movement
The raising of amount needs to consider the protection of MOV itself.
Currently, series capacitor compensation system protection system generally configures MOV protecting energy, when event occurs for electric system
Barrier, when MOV absorption energy reaches protecting energy definite value, the conducting of pilot spark gap bypasses MOV.Since string mends protection system
Inherent delay reaches definite value from MOV actual absorption energy and there is certain prolong to protection system trigger spark gap conducting
When.If MOV protecting energy is integrally delayed excessive, the MOV constant absorption energy during delay, MOV will explode when serious,
Jeopardize equipment even personal safety.String complement system has the whole delay of the processes such as MOV protection act and spark gap conducting
Clearly require, be usually no more than 1ms.Therefore, one of the important performance characteristic of protection system is mended as string, it is necessary to measure
MOV protecting energy is integrally delayed, and provides foundation for string complement system design.
Prolong it was found by the inventors of the present invention that patent CN105846445A proposes that a kind of shortening series compensation gap triggering is whole
When method and system, but actual time delay is not measured and is assessed.Patent CN107797052A proposes a kind of string supplementary set
Chinese style acquisition system protection act delay measurement system and method, the measurement method introduce exit relay action delay, but
It is not used to MOV protecting energy.Simultaneously as MOV actual absorption energy is not easy to measure, cause to measure MOV protecting energy entirety
There are certain difficulties for delay, and document there is no to measure the delay at present.
Summary of the invention
The measurement method for being designed to provide metal oxide pressure-limiting device protecting energy and being integrally delayed of the embodiment of the present invention
And device, it is integrally delayed with measuring metal oxide pressure-limiting device protecting energy, the design for series capacitor compensation system provides
Foundation.
The embodiment of the invention provides a kind of measurement method that metal oxide pressure-limiting device protecting energy is integrally delayed, packets
It includes:
The electric current for triggering the movement of metal oxide pressure-limiting device protecting energy is input to series electrical to be tested by measuring device
Container compensates protection system；
It obtains the current sampling data of the metal oxide pressure-limiting device simultaneously and the output voltage of pulse transformer is adopted
Sample data；
Based on the current sampling data, the absorption energy of the metal oxide pressure-limiting device is calculated；
The reference time is set as at the time of the absorption energy is reached pre-value；
Operating time of protection is set as at the time of the output voltage sampled data is reached peak value；
Metal oxide pressure-limiting device energy is determined by the reference time and the time difference of the operating time of protection
The whole delay of protection.
Further, the measuring device will trigger metal oxide pressure-limiting device protecting energy movement electric current be input to
Test series capacitor compensation protection system include:
The relay-protection tester of the measuring device will trigger the electric current of metal oxide pressure-limiting device protecting energy movement
It is input to series capacitor compensation protection system to be tested.
Further, current sampling data and pulse transformer described while that obtain the metal oxide pressure-limiting device
Output voltage sampled data, comprising:
Using binary channels, simultaneously and concurrently the method for sampling obtains the current sample number of the metal oxide pressure-limiting device simultaneously
Accordingly and the output voltage sampled data of pulse transformer.
Further, current sampling data and pulse transformer described while that obtain the metal oxide pressure-limiting device
Output voltage sampled data, comprising:
It is connected in parallel in the low pressure probe measurement electric current of the oscillograph at sampling resistor both ends；
Data processor carries out data processing to the measurement electric current and obtains the current sampling data；
Wherein, the sampling resistor is connected in series in the current loop of series capacitor compensation protection system.
Further, current sampling data and pulse transformer described while that obtain the metal oxide pressure-limiting device
Output voltage sampled data, comprising:
It is connected in parallel in the high-voltage probe measurement output voltage of the oscillograph of the pulse transformer secondary voltage output end；
Data processor carries out data processing to the measurement output voltage and obtains the output voltage sampled data.
Further, the oscillograph or data processor store the current sampling data and output voltage sampling
Data.
Further, described to be based on the current sampling data, the absorption energy of the metal oxide pressure-limiting device is calculated,
Include:
Based on the current sampling data, corresponding electricity is determined by the VA characteristic curve of the metal oxide pressure-limiting device
Pressure；
Based on the current sampling data and the corresponding voltage, the absorption energy of the metal oxide pressure-limiting device is calculated
Amount.
The embodiment of the present invention also provides a kind of measuring device that metal oxide pressure-limiting device protecting energy is integrally delayed, packet
It includes:
Relay-protection tester is connected in series in series capacitor compensation protection system to be tested, for that will trigger gold
The electric current for belonging to the movement of oxide voltage limiter protecting energy is input to series capacitor compensation protection system to be tested；
Sampling resistor, is connected in series in the relay-protection tester and series capacitor compensation protection system is constituted
Current loop in, be used for sample rate current；
Low pressure probe, is connected in parallel in the sampling resistor both ends, for measuring electric current；
High-voltage probe is connected in parallel in the pulse transformer secondary voltage output end of series capacitor compensation protection system,
For measuring output voltage；
Oscillograph connects the low pressure probe and high-voltage probe, for showing the measurement electric current and measurement output
Voltage；
Data processor connects the oscillograph, for counting to the measurement electric current and the measurement output voltage
It is integrally delayed calculating according to processing and metal oxide pressure-limiting device protecting energy.
Further, the sampling resistor is noninductive precision resistance.
Further, the oscillograph or data processor are also used to store the measurement electric current and measurement output electricity
Pressure.
The technical solution that embodiment through the invention provides, provides metal oxide pressure-limiting device protecting energy and integrally prolongs
When measurement method and device, for go here and there complement system design provide foundation.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is a kind of measurement side that metal oxide pressure-limiting device protecting energy is integrally delayed that one embodiment of the invention provides
Method flow diagram；
Fig. 2 be another embodiment of the present invention provides a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed
Method flow schematic diagram；
Fig. 3 is a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed that further embodiment of this invention provides
Method flow schematic diagram；
Fig. 4 is series capacitor compensation protection system composition schematic diagram to be measured；
Fig. 5 is a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed provided by one embodiment of the present invention
Device composition schematic diagram；
Fig. 6 is a kind of MOV current waveform schematic diagram for playback provided in an embodiment of the present invention；
Fig. 7 is that MOV provided in an embodiment of the present invention absorbs energy and pulse transformer output voltage waveforms schematic diagram.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below with reference to drawings and examples,
The specific embodiment progress of technical solution of the present invention in further detail, is clearly illustrated.However, specific implementations described below
Mode and embodiment are for illustrative purposes only, rather than limiting the invention.It only contains a part of the invention and implements
Example, instead of all the embodiments, the other embodiments that those skilled in the art obtain various change of the invention all belong to
In the scope of protection of the invention.
Fig. 4 is series capacitor compensation protection system composition schematic diagram to be measured.Series capacitor compensation protects system 2 to make
To be tested object, as shown in figure 4, test scope is input to the pulse transforming of spark gap contact system with measuring device electric current
Device 26 exports, including data acquisition module 21, combining unit 22, series capacitor compensation protective device (string mends protective device)
23, gap trigger circuit 25 and its energy supplying system 24, pulse transformer 26 etc..
Fig. 1 is a kind of measurement side that metal oxide pressure-limiting device protecting energy is integrally delayed that one embodiment of the invention provides
Method flow diagram, includes the following steps.
In step s 110, measuring device will trigger metal oxide pressure-limiting device protecting energy movement electric current be input to
The series capacitor compensation of test protects system.
The relay-protection tester of measuring device will trigger the electric current of metal oxide pressure-limiting device (MOV) protecting energy movement
Recorder data playback is input to series capacitor compensation protection system to be tested, is triggered with simulating metal oxide pressure-limiting device
Electrician's condition of protection act.
As shown in fig. 6, Fig. 6 is a kind of MOV current waveform schematic diagram for playback provided in an embodiment of the present invention.Horizontal seat
It is designated as time, the current recording data that the protecting energy that ordinate is metal oxide pressure-limiting device MOV acts.
In the step s 120, at the same obtain metal oxide pressure-limiting device current sampling data and pulse transformer it is defeated
Voltage sample data out.
The current sampling data and pulse of metal oxide pressure-limiting device in series capacitor compensation protection system are obtained simultaneously
The output voltage sampled data of transformer, using the binary channels simultaneously and concurrently method of sampling.Current sampling data and output voltage are adopted
Sample data are stored in oscillograph or data processor.
In step s 130, it is based on current sampling data, calculates the absorption energy of metal oxide pressure-limiting device.It needs clear
, it is consistent to absorb the algorithm used in the computational algorithm and series capacitor compensation protection system of energy.
In step S140, it will absorb at the time of energy reaches pre-value and be set as the reference time.
It should be clear that absorbing energy pre-value is preset absorption protecting energy definite value, with series capacitance to be tested
The absorption protecting energy definite value being arranged in device compensation protection system is consistent.
In step S150, operating time of protection is set as at the time of output voltage sampled data is reached peak value.
In the sampled data of pulse transformer output voltage, maximum value is peak value, at the time of extraction voltage reaches peak value
It is set as operating time of protection.
In step S160, metal oxide pressure-limiting device is determined by reference to time and the time difference of operating time of protection
Protecting energy is integrally delayed.
The time difference of reference time and operating time of protection are calculated, the time difference is metal oxide pressure-limiting device protecting energy
Whole delay.
Fig. 7 is that MOV provided in an embodiment of the present invention absorbs energy and pulse transformer output voltage waveforms schematic diagram.Such as figure
Shown in 7, curve 1 represents MOV and absorbs energy curve, and curve 3 represents pulse transformer output voltage curve, takes on curve 1 pre-
If the intersection point of absorption protecting energy definite value 2,2 and 1 be the reference time, the time to peak of curve 3 is operating time of protection,
Reference time and the time difference of operating time of protection are that the MOV protecting energy to be calculated integrally is delayed.
The technical solution provided through this embodiment provides the survey that metal oxide pressure-limiting device protecting energy is integrally delayed
Method and device is measured, the design for string complement system provides foundation.
Also, the technical solution of the present embodiment, electric current and voltage is using binary channels simultaneously and concurrently high-speed sampling, use with
Series capacitor compensation protects the identical algorithm of system and absorbs protecting energy definite value, and measurement result is accurate and reliable, technical solution
It is easy to implement effective.
Fig. 2 be another embodiment of the present invention provides a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed
Method flow schematic diagram includes the following steps.
In step S210, measuring device will trigger metal oxide pressure-limiting device protecting energy movement electric current be input to
The series capacitor compensation of test protects system.
In step S221, it is connected in parallel in the low pressure probe measurement electric current of the oscillograph at sampling resistor both ends.
Wherein, the electricity that sampling resistor is connected in series in relay-protection tester and series capacitor compensation protection system is constituted
It flows back in road.Sampling resistor is noninductive precision resistance.
In step S222, data processor carries out data processing to measurement electric current and obtains current sampling data.At data
Reason includes filtering processing.
In step S223, it is connected in parallel in the high-voltage probe measurement of the oscillograph of pulse transformer secondary voltage output end
Output voltage.
In step S224, data processor carries out data processing to measurement output voltage and obtains output voltage hits
According to.Data processing includes filtering processing.
Oscillograph or data processor storage current sampling data and output voltage sampled data.
In step S230, it is based on current sampling data, calculates the absorption energy of metal oxide pressure-limiting device.
In step S240, it will absorb at the time of energy reaches pre-value and be set as the reference time.
In step s 250, protection act is set as at the time of pulse transformer output voltage sampled data being reached peak value
Time.
In step S260, determine that metal is aoxidized by the reference time and the time difference of the operating time of protection
Object voltage limiter protecting energy is integrally delayed.
In the present embodiment, step S210, the step S110 of S230, S240, S250, S260, S270 and above-described embodiment,
S130, S140, S150, S160, S170 detailed process are identical, repeat no more.
The technical solution of the present embodiment uses noninductive accurate sampling resistor and carries out current sample measurement, reduces measurement
Device itself delay, data processor the current data such as filters and are handled, and measurement result is more accurate and reliable.
In technical solution provided in this embodiment, data processor the processing such as is filtered to output voltage data, is adopted
With algorithm identical with series capacitor compensation protection system and protecting energy definite value is absorbed, measurement result more accurately may be used
It leans on.
Fig. 3 is a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed that yet another embodiment of the invention provides
Method flow schematic diagram includes the following steps.
In step s310, measuring device will trigger metal oxide pressure-limiting device protecting energy movement electric current be input to
The series capacitor compensation of test protects system.
In step s 320, while the current sampling data and pulse transformer of the metal oxide pressure-limiting device being obtained
Output voltage sampled data.
In step S331, it is based on current sampling data, the VA characteristic curve for inquiring metal oxide pressure-limiting device obtains
Corresponding voltage.
It should be clear that the VA characteristic curve of metal oxide pressure-limiting device and series capacitor compensation to be tested are protected
The VA characteristic curve used in protecting system is consistent.
In step S332, it is based on current sampling data and corresponding voltage, calculates the absorption energy of metal oxide pressure-limiting device
Amount.
In step S340, it will absorb at the time of energy reaches pre-value and be set as the reference time.
In step S350, operating time of protection is set as at the time of output voltage sampled data is reached peak value.
In step S360, metal oxide pressure-limiting device is determined by reference to time and the time difference of operating time of protection
Protecting energy is integrally delayed.
In the present embodiment, step S210, the step S110 of S220, S230, S250, S260, S270 and above-described embodiment,
S120, S130, S150, S160, S170 detailed process are identical, repeat no more.
In technical solution provided in this embodiment, the VA characteristic curve of metal oxide pressure-limiting device is connected with to be tested
The VA characteristic curve used in capacitor compensation protection system is consistent, and measurement result is more accurate and reliable.
Fig. 5 is a kind of measurement that metal oxide pressure-limiting device protecting energy is integrally delayed provided by one embodiment of the present invention
Device composition schematic diagram.Measuring device include relay-protection tester 11, sampling resistor 12, low pressure probe 13, high-voltage probe 16,
Oscillograph 14, data processor 15.
Relay-protection tester 11 is connected in series in series capacitor compensation protection system 2 to be tested, playback triggering gold
Current recording data to the series capacitor compensation for belonging to the movement of oxide voltage limiter protecting energy protects system 2.Sampling resistor 12
It is connected in series in relay-protection tester 11 and the current loop of the series capacitor compensation protection composition of system 2, sample rate current.
Low pressure probe 13 is connected in parallel in 12 both ends of sampling resistor, and cooperation sampling resistor 12 measures electric current.High-voltage probe 16 is connected in parallel
In the 26 secondary voltage output end of pulse transformer of series capacitor compensation protection system 2, the output of pulse transformer 26 is measured
Voltage.Oscillograph 14 connects low pressure probe 13 and high-voltage probe 16, display measurement electric current and measurement output voltage.Data processor
15 connection oscillographs 14, electric current and output voltage to sampling carry out data processing and metal oxide pressure-limiting device protecting energy is whole
Body delay calculates.Sampling resistor 12 is noninductive precision resistance.Oscillograph 14 or data processor 15 are also used to store measurement electric current
With measurement output voltage.
It should be noted that each embodiment above by reference to described in attached drawing is only to illustrate the present invention rather than limits this
The range of invention, those skilled in the art should understand that, it is right under the premise without departing from the spirit and scope of the present invention
The modification or equivalent replacement that the present invention carries out, should all cover within the scope of the present invention.In addition, signified unless the context
Outside, the word occurred in the singular includes plural form, and vice versa.In addition, unless stated otherwise, then any embodiment
All or part of in combination with any other embodiment all or part of come using.
Claims (10)
1. a kind of measurement method that metal oxide pressure-limiting device protecting energy is integrally delayed, comprising:
The electric current for triggering the movement of metal oxide pressure-limiting device protecting energy is input to series capacitor to be tested by measuring device
Compensate protection system；
The current sampling data of the metal oxide pressure-limiting device and the output voltage hits of pulse transformer are obtained simultaneously
According to；
Based on the current sampling data, the absorption energy of the metal oxide pressure-limiting device is calculated；
The reference time is set as at the time of the absorption energy is reached pre-value；
Operating time of protection is set as at the time of the output voltage sampled data is reached peak value；
Metal oxide pressure-limiting device protecting energy is determined by the reference time and the time difference of the operating time of protection
Whole delay.
2. according to the method described in claim 1, wherein, the measuring device will trigger metal oxide pressure-limiting device protecting energy
The electric current of movement is input to series capacitor compensation protection system to be tested
The relay-protection tester of the measuring device inputs the electric current for triggering the movement of metal oxide pressure-limiting device protecting energy
System is protected to series capacitor compensation to be tested.
3. according to the method described in claim 1, wherein, current sample that is described while obtaining the metal oxide pressure-limiting device
The output voltage sampled data of data and pulse transformer, comprising:
Use binary channels simultaneously and concurrently the method for sampling come and meanwhile obtain the current sampling data of the metal oxide pressure-limiting device with
And the output voltage sampled data of pulse transformer.
4. according to the method described in claim 1, wherein, current sample that is described while obtaining the metal oxide pressure-limiting device
The output voltage sampled data of data and pulse transformer, comprising:
It is connected in parallel in the low pressure probe measurement electric current of the oscillograph at sampling resistor both ends；
Data processor carries out data processing to the measurement electric current and obtains the current sampling data；
Wherein, the sampling resistor is connected in series in the current loop of series capacitor compensation protection system.
5. according to the method described in claim 1, wherein, current sample that is described while obtaining the metal oxide pressure-limiting device
The output voltage sampled data of data and pulse transformer, comprising:
It is connected in parallel in the high-voltage probe measurement output voltage of the oscillograph of the pulse transformer secondary voltage output end；
Data processor carries out data processing to the measurement output voltage and obtains the output voltage sampled data.
6. method according to claim 4 or 5, wherein the oscillograph or data processor store the current sample
Data and the output voltage sampled data.
7. it is described to be based on the current sampling data according to the method described in claim 1, wherein, calculate the metal oxidation
The absorption energy of object voltage limiter, comprising:
Based on the current sampling data, corresponding voltage is determined by the VA characteristic curve of the metal oxide pressure-limiting device；
Based on the current sampling data and the corresponding voltage, the absorption energy of the metal oxide pressure-limiting device is calculated.
8. a kind of measuring device that metal oxide pressure-limiting device protecting energy is integrally delayed, comprising:
Relay-protection tester is connected in series in series capacitor compensation protection system to be tested, for that will trigger metal oxygen
The electric current of compound voltage limiter protecting energy movement is input to series capacitor compensation protection system to be tested；
Sampling resistor is connected in series in the electricity of the relay-protection tester and series capacitor compensation protection system composition
It flows back in road, is used for sample rate current；
Low pressure probe, is connected in parallel in the sampling resistor both ends, for measuring electric current；
High-voltage probe is connected in parallel in the pulse transformer secondary voltage output end of series capacitor compensation protection system, is used for
Measure output voltage；
Oscillograph connects the low pressure probe and high-voltage probe, for showing the measurement electric current and the measurement output voltage；
Data processor connects the oscillograph, for carrying out at data to the measurement electric current and the measurement output voltage
Reason and metal oxide pressure-limiting device protecting energy are integrally delayed calculating.
9. device according to claim 8, wherein the sampling resistor is noninductive precision resistance.
10. device according to claim 8, wherein the oscillograph or data processor are also used to store the measurement
Electric current and the measurement output voltage.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810751835.9A CN109100588B (en) | 2018-07-10 | 2018-07-10 | Method and device for measuring integral time delay of energy protection of metal oxide voltage limiter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810751835.9A CN109100588B (en) | 2018-07-10 | 2018-07-10 | Method and device for measuring integral time delay of energy protection of metal oxide voltage limiter |
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| CN109100588A true CN109100588A (en) | 2018-12-28 |
| CN109100588B CN109100588B (en) | 2021-07-27 |
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| CN113791317A (en) * | 2021-08-30 | 2021-12-14 | 中国南方电网有限责任公司超高压输电公司南宁局 | Metal oxide variable resistance test circuit, system and method |
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| CN109100588B (en) | 2021-07-27 |
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